Semgrep Scanner
FreeNot checkedRun Semgrep static analysis from an AI agent. OWASP top 10, secrets detection, custom rule packs. Baseline scanning to focus only on newly-introduced findings.
About
Run Semgrep static analysis from an AI agent. OWASP top 10, secrets detection, custom rule packs. Baseline scanning to focus only on newly-introduced findings. Built for production-grade security review workflows.
README
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MCP Semgrep Scanner
Run Semgrep static analysis from an AI agent. Lets an agent scan a repo with prebuilt rulesets (OWASP top 10, secrets, language-specific packs), surface findings with severity scoring, and run baseline diffs to focus only on newly-introduced issues.
Tools
scan— run a default scan (p/security-audit + p/secrets) and return findings sorted by severityscan_with_ruleset— scan with one or more named rulesets (p/owasp-top-ten,p/python, etc.)list_rulesets— built-in rulesets available without a Semgrep accountget_finding_details— full rule metadata + remediation hint for a finding IDbaseline_scan— scan only files modified since a git ref (HEAD~1, main, custom SHA)
What gets returned
Each finding includes:
rule_id— the Semgrep rule that matchedseverity—ERROR|WARNING|INFOcwe— CWE classification if availableowasp— OWASP category mappingfile+line_start+line_endmessage— human-readable explanationfix— suggested patch if available
Quick start
pip install mcp-semgrep-scanner
# Optional: Semgrep account token for Pro rules
export SEMGREP_APP_TOKEN="..."
mcp-semgrep-scanner serve
Typical agent workflow
Agent: "Are there any security issues in this PR?"
↓
1. baseline_scan(repo="/path/to/repo", base_ref="origin/main")
→ returns only findings introduced by the PR's diff
2. get_finding_details(finding_id=...) for the ERROR-severity ones
3. Agent suggests fixes inline in PR review
License
MIT.
Installing Semgrep Scanner
This server has no published package — it is built from source. Open the repository and follow its README.
▸ github.com/archimedes-market/mcp-semgrep-scannerFAQ
Is Semgrep Scanner MCP free?
Yes, Semgrep Scanner MCP is free — one-click install via Unyly at no cost.
Does Semgrep Scanner need an API key?
No, Semgrep Scanner runs without API keys or environment variables.
Is Semgrep Scanner hosted or self-hosted?
Self-hosted: the server runs locally on your machine via the install command above.
How do I install Semgrep Scanner in Claude Desktop, Claude Code or Cursor?
Open Semgrep Scanner on unyly.org, pick your client tab (Claude Desktop, Claude Code, Cursor) and press Install — the config is generated automatically, no JSON editing.
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